pub type DTOGRX_W<'a, const O: u8> = BitWriter<'a, u32, CHEP3R_SPEC, bool, O>;Expand description
Field DTOGRX writer - Data Toggle, for reception transfers If the endpoint/channel is not Isochronous, this bit contains the expected value of the data toggle bit (0=DATA0, 1=DATA1) for the next data packet to be received. Hardware toggles this bit, when the ACK handshake is sent following a data packet reception having a matching data PID value; if the endpoint is defined as a control one, hardware clears this bit at the reception of a SETUP PID received from host (in device) or acknowledged by device (in host). If the endpoint/channel is using the double-buffering feature this bit is used to support packet buffer swapping too (Refer to ). If the endpoint/channel is Isochronous, this bit is used only to support packet buffer swapping for data transmission since no data toggling is used for this kind of channels/endpoints and only DATA0 packet are transmitted (Refer to Isochronous transfers). Hardware toggles this bit just after the end of data packet reception, since no handshake is used for isochronous transfers. This bit can also be toggled by the software to initialize its value (mandatory when the endpoint is not a control one) or to force specific data toggle/packet buffer usage. When the application software writes ’0, the value of DTOGRX remains unchanged, while writing ’1 makes the bit value toggle. This bit is read/write but it can be only toggled by writing 1.